Coverity CID 185505

Coverity CID 185504

# Conflicts:
#	src/slurmctld/job_mgr.c

Bug 5129.

Bug 5110.

Bug 5110.

Continuation of d0deea4f.

Bug 4841.

Use setenv() instead of setenvfs(), since setenvfs() memory allocation
is implemented with xmalloc() and fini_setproctitle() (which is called
on reconfigure) free's the memory with free(), leading to a:
"free(): invalid size" malloc_printerr error.

Continuation of dce83a23.

Bug 5095.

Due to current design the job limits are checked before the allocation is
made when one specifies a generic gres and a specific gres type is configured.
The workaround for now is to define a job submit plugin to control the user
request and succesfully apply limits.

Bug 4767

With the previous commit, a segfault would occur if the partiton's nodes
were updated after a reconfigure happened because reconfigure blows away
the node_record_table_ptr and the node's tres_cnt don't get rebuilt till
after PERIODIC_NODE_ACCT (300 seconds).

or when creating partitions with nodes. Though the the partition
tres_cnts will be updated every 5 minutes (PERIODIC_NODE_ACCT) this will
update it on create or update.

Bug 4274

Bug 4274

Verify that a tres weight is an integer.

This allows job limits to be enforced at submission -- with QOS
DenyOnLimit flag. Note that the values could be expanded at schedule
time (e.g. request one task but get all cpus on a core). The expanded
values are considered when scheduling.

Cont. Bug 4274

Cont. Bug 4274

being able to be set/updated on a partition.

Bug 4274

Bug 4274

Bug 5103

Bug 4960.

Bug 4887.

Bug 5103

Bug 5103

# Conflicts:
#	src/slurmctld/job_mgr.c

Can lead to deadlock within malloc depending on the exact timing.

Rework thread startup and shutdown code so pthread_cancel is not
needed.

Bug 5119, 5103.